a toy boat that is floating in a 3- foot deep aquarium carries a rock
if a 2-foot string is tied to the rock before it is thrown overboard and is thrown
overboard
into water
1. does the boat float higher, lower, or the same, in the water? why?
2. does the lelvel of the water in the aquarium rise, fall, or stay the same? why?
2006-11-29 18:39:18 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Well the answer is obvious but I don't have time, gotta go....
2006-11-29 18:48:59 · answer #1 · answered by Anonymous · 0⤊ 0⤋
(1) The submerged rock is partially supported by the weight of the water displaced by its volume, so the force on the string is less than the weight of the rock when it was in the boat. In other words, the boat will float higher.
(2) Since in both cases, the total (Rock + Boat + String) weight must match the weight of the total volume of water displaced and that total weight doesn't change, the total volume of water displaced doesn't change either. In other words, the water level in the aquarium remains the same.
2006-11-30 03:54:19 · answer #2 · answered by shimrod 4 · 0⤊ 0⤋
i would think that all depends on the size of the boat and the rock
in general, the boat should be higher because boats float in water, rocks do not
level of the water in the aquarium should rise because if the rock is pulling the boat down, the water is going to be displaced by the boat and the empty space of the boat that it now occupies
2006-11-29 19:14:36 · answer #3 · answered by interlude 4 · 0⤊ 0⤋